| 摘要 |
A power-take-off clutch having a shaft and a friction disc rotatable in unison and having a pulley piloted on the shaft to be axially moved into friction and therefore driving contact with the disc for the power-take-off. A series of ball bearings are on the shaft, including one for mounting the pulley, and other ball bearings are available for receiving an actuator which axially displaces the pulley for the drive engagement mentioned. The ball bearings have their inner races with hexagonally shaped bores which slide on the hexagonally shaped shaft, and thus the shaft and the inner races do not rotate relative to each other and they therefore do not wear out.
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